#pragma once
#define ll long long
#include<iostream>
#include<cmath>
#include<vector>
#include<algorithm>
#include<fstream>
#include<string>
#include<stack>
#include <time.h> 
#include<map>
using std::string;
using std::vector;
using std::stack;
using std::map;
namespace math
{
	const double pi = 3.1415926;
	const double eps = 0.0000001;
}
